<?php

/**
 * @file
 * Admin page callbacks for the Contact module.
 */

/**
 * Categories/list tab.
 */
function contact_category_list() {
	$header = array(
			t('Category'),
			t('Recipients'),
			t('Selected'),
			array('data' => t('Operations'), 'colspan' => 2),
	);
	$rows = array();

	// Get all the contact categories from the database.
	$categories = db_select('contact', 'c')
	->addTag('translatable')
	->fields('c', array('cid', 'category', 'recipients', 'selected'))
	->orderBy('weight')
	->orderBy('category')
	->execute()
	->fetchAll();

	// Loop through the categories and add them to the table.
	foreach ($categories as $category) {
		$rows[] = array(
				check_plain($category->category),
				check_plain($category->recipients),
				($category->selected ? t('Yes') : t('No')),
				l(t('Edit'), 'admin/structure/contact/edit/' . $category->cid),
				l(t('Delete'), 'admin/structure/contact/delete/' . $category->cid),
		);
	}

	if (!$rows) {
		$rows[] = array(array(
				'data' => t('No categories available.'),
				'colspan' => 5,
		));
	}

	$build['category_table'] = array(
			'#theme' => 'table',
			'#header' => $header,
			'#rows' => $rows,
	);
	return $build;
}

/**
 * Form constructor for the category edit form.
 *
 * @param $category
 *   An array describing the category to be edited. May be empty for new
 *   categories. Recognized array keys are:
 *   - category: The name of the category.
 *   - recipients: A comma-separated list of recipients.
 *   - reply: (optional) The body of the auto-reply message.
 *   - weight: The weight of the category.
 *   - selected: Boolean indicating whether the category should be selected by
 *     default.
 *   - cid: The category ID for which the form is to be displayed.
 *
 * @see contact_category_edit_form_validate()
 * @see contact_category_edit_form_submit()
 * @ingroup forms
 */
function contact_category_edit_form($form, &$form_state, array $category = array()) {
	// If this is a new category, add the default values.
	$category += array(
			'category' => '',
			'recipients' => '',
			'reply' => '',
			'weight' => 0,
			'selected' => 0,
			'cid' => NULL,
	);

	$form['category'] = array(
			'#type' => 'textfield',
			'#title' => t('Category'),
			'#maxlength' => 255,
			'#default_value' => $category['category'],
			'#description' => t("Example: 'website feedback' or 'product information'."),
			'#required' => TRUE,
	);
	$form['recipients'] = array(
			'#type' => 'textarea',
			'#title' => t('Recipients'),
			'#default_value' => $category['recipients'],
			'#description' => t("Example: 'webmaster@example.com' or 'sales@example.com,support@example.com' . To specify multiple recipients, separate each e-mail address with a comma."),
			'#required' => TRUE,
	);
	$form['reply'] = array(
			'#type' => 'textarea',
			'#title' => t('Auto-reply'),
			'#default_value' => $category['reply'],
			'#description' => t('Optional auto-reply. Leave empty if you do not want to send the user an auto-reply message.'),
	);
	$form['weight'] = array(
			'#type' => 'weight',
			'#title' => t('Weight'),
			'#default_value' => $category['weight'],
			'#description' => t('When listing categories, those with lighter (smaller) weights get listed before categories with heavier (larger) weights. Categories with equal weights are sorted alphabetically.'),
	);
	$form['selected'] = array(
			'#type' => 'select',
			'#title' => t('Selected'),
			'#options' => array(
					0 => t('No'),
					1 => t('Yes'),
			),
			'#default_value' => $category['selected'],
			'#description' => t('Set this to <em>Yes</em> if you would like this category to be selected by default.'),
	);
	$form['cid'] = array(
			'#type' => 'value',
			'#value' => $category['cid'],
	);
	$form['actions'] = array('#type' => 'actions');
	$form['actions']['submit'] = array(
			'#type' => 'submit',
			'#value' => t('Save'),
	);

	return $form;
}

/**
 * Form validation handler for contact_category_edit_form().
 *
 * @see contact_category_edit_form_submit()
 */
function contact_category_edit_form_validate($form, &$form_state) {
	// Validate and each e-mail recipient.
	$recipients = explode(',', $form_state['values']['recipients']);

	// When creating a new contact form, or renaming the category on an existing
	// contact form, make sure that the given category is unique.
	$category = $form_state['values']['category'];
	$query = db_select('contact', 'c')->condition('c.category', $category, '=');
	if (!empty($form_state['values']['cid'])) {
		$query->condition('c.cid', $form_state['values']['cid'], '<>');
	}
	if ($query->countQuery()->execute()->fetchField()) {
		form_set_error('category', t('A contact form with category %category already exists.', array('%category' => $category)));
	}

	foreach ($recipients as &$recipient) {
		$recipient = trim($recipient);
		if (!valid_email_address($recipient)) {
			form_set_error('recipients', t('%recipient is an invalid e-mail address.', array('%recipient' => $recipient)));
		}
	}
	$form_state['values']['recipients'] = implode(',', $recipients);
}

/**
 * Form submission handler for contact_category_edit_form().
 *
 * @see contact_category_edit_form_validate()
 */
function contact_category_edit_form_submit($form, &$form_state) {
	if ($form_state['values']['selected']) {
		// Unselect all other contact categories.
		db_update('contact')
		->fields(array('selected' => '0'))
		->execute();
	}

	if (empty($form_state['values']['cid'])) {
		drupal_write_record('contact', $form_state['values']);
	}
	else {
		drupal_write_record('contact', $form_state['values'], array('cid'));
	}

	drupal_set_message(t('Category %category has been saved.', array('%category' => $form_state['values']['category'])));
	watchdog('contact', 'Category %category has been saved.', array('%category' => $form_state['values']['category']), WATCHDOG_NOTICE, l(t('Edit'), 'admin/structure/contact/edit/' . $form_state['values']['cid']));
	$form_state['redirect'] = 'admin/structure/contact';
}

/**
 * Form constructor for the contact category deletion form.
 *
 * @param $contact
 *   Array describing the contact category to be deleted. See the documentation
 *   of contact_category_edit_form() for the recognized keys.
 *
 * @see contact_menu()
 * @see contact_category_delete_form_submit()
 */
function contact_category_delete_form($form, &$form_state, array $contact) {
	$form['contact'] = array(
			'#type' => 'value',
			'#value' => $contact,
	);

	return confirm_form(
			$form,
			t('Are you sure you want to delete %category?', array('%category' => $contact['category'])),
			'admin/structure/contact',
			t('This action cannot be undone.'),
			t('Delete'),
			t('Cancel')
	);
}

/**
 * Form submission handler for contact_category_delete_form().
 */
function contact_category_delete_form_submit($form, &$form_state) {
	$contact = $form['contact']['#value'];

	db_delete('contact')
	->condition('cid', $contact['cid'])
	->execute();

	drupal_set_message(t('Category %category has been deleted.', array('%category' => $contact['category'])));
	watchdog('contact', 'Category %category has been deleted.', array('%category' => $contact['category']), WATCHDOG_NOTICE);

	$form_state['redirect'] = 'admin/structure/contact';
}
